How emulsions are classified ? Give one example for each type of emulsion.

Explanation

Emulsion: A dispersion of finely divided droplets of a liquid in another liquid medium is called 'emulsion'.
Ex: Milk
In Milk, the droplets of liquid fat are dispersed in water. This is an example for oil in water type emulsion.
Classification of emulsions : Emulsions are classified into two classes. These are
a) oil in water (O/W) and
b) water in oil (W/O), (O = Oil, W = Water).
These emulsions are classified as such depending on which is dispersed phase and which is dispersion medium.
a) Oil in Water (O/W) type emulsions : In this type of emulsions, the dispersed phase is oil and the dispersion medium is water.
Ex : Milk, liquid, fat (oil) in water.
Vanishing cream, fat in water.
b) Water in Oil (W/O) type emulsions : In this type of emulsions, the dispersed phase is water and the dispersion medium is oil.
Ex :Stiff greases water in lubrication oils
Cod liver oil : water in cod liver oil
Cold cream : water in fat.